Boiler.



Patented May 2, 1905.

PATENT OEEicE9 CARL OLSON, OF VFST SOMERVILLE, MASSACHUSETTS.

BOILER.

SPECIFICATION forming part of Letters Patent No. 789,054, dated May 2, 1905. Application led July 15, 1903. Serial No. 165,606.

To @ZZ whom, t mln/U concern:

Be it known that I, OARL OLsoN, a citizen of the United States, residing at West Somerville, in the county of Middlesex and State of Massachusetts, have invented new and useful Improvements in Boilers and Settings, of which the following is a specification.

The object of this invention is to provide an improved setting for horizontal tubular boilers by means of which the heat contained in the gases and products of combustion from the tire may be economicallyT and etiiciently utilized with much less percentage of waste heat passing into the smoke-stack than in the forms of setting' for horizontal boilers now in use.

The invention consists in the combination and arrangement of parts set forth in the following specification and particularly pointed out in the claims thereof.

Referring to the drawings, Figure 1 is a central vertical longitudinal section of my improved boiler setting with a horizontal tubular boiler shown in elevation in connection therewith. Fig. 2 is a view taken from the front of the boiler, the right-hand half of which is a front elevation and the left-hand half a section taken on line 2 Q of Fig. 1, the front end of the boiler being left in elevation. Fig. 3 is a horizontal section taken on line 3 3 of Fig. 1.

Like numerals refer to like parts throughout the several views of the drawings.

ln the drawings, 5 is a horizontal tubular boiler of a well-known type, and 6 the setting for said boiler, comprising' an ash-pit 7, a {irebox 8, a bridge 9, side walls 10 10, rear wall 11, and srnokestack 12. The boiler has brackets 13 13 fast thereto, which rest upon the side walls 10 10. At each side of the boiler adjacent thereto are provided Afiues 14 14, which are connected at their front ends by a smoke-box 15. Said smoke-box extends transversely across the boiler at the front end thereof, the front ends of the tubes 16 of said boiler opening into said smoke-box, the rear ends of the side flues 14 14 opening into the smoke-stack 12. At the rear ot' the bridge 9 is provided a combustion-chamber 17, said cornbustion-chamber passing upwardly between the auxiliary side walls 18 18 and the rear wall 11 to the rear end of the tubes 16. A bridge-Hue 19 connects the ash-pit 7 with the combustion-chamber 17.

In operation the lire is built in the usual way upon the grate 20, and the heated gases and products of combustion pass over the bridge-wall 9 and into the combustion-charn ber 17. A portion of the air which enters the ash-pit passes upwardly through the grate and through the fire, and a portion passes through the bridge-flue 19 directly into the combustion-chamber'. By this means a large amount of air is introduced into the combustion-chamber, securing a very perfect combustion of the gases and products from the tire upon the grate. Said bridge-fine also affords a convenient means for cleaning out the combustion-chamber 17 The heated gases pass from the combustion-chamber' upwardly and into the boiler-tubes 16 at the rear end of the boiler, thence forwardly through said tubes into the smoke-box 15, and diverging to each side pass rearwardly along each side of t-he boiler 5 and through the side iiues 14. It will readily be seen that as the heated gases pass through the iiues 14 14 they assist in heating the water contained in the boiler 5, and thus a large amount of heat is obtained from said gases which ordinarily passes directly upward through the smoke-stack at the front end of the boiler.

It will be seen that the cylindrical shell of the tubular boiler 5 forms one wall of the lirebox of the combustion-chamber and of the side tlues, so that the heated gases and flames from the lire in the combustion-chamber and in the iiues come in direct contact with the shell of the boiler, thus attaining the greatest possible efficiency.

Having thus described my invention, what I claim, and desire by Letters Patent to secure,

1. A boiler having av plurality of tubes, a unitary shell setting entirely surrounding the boiler and forming a support therefor and embodying a stack, passages leading from said stack and in communication with the said tubes, a fire-box having a bridge provided with upper and lower openings, and a com- IOO buStion-ohamber within the shell below the boiler and communicating with the said tubes and said openings in the bridge.

2. A unitary setting for a boiler having flue- 5 tubes embodying` a plurality of walls entirely surrounding the boiler and forming a combustion-chamber and a smoke-stack in communication with the tubes of the boiler, and arebox having a bridge with upper and lower 10 openings communicating with the combustion-chamber, a part of the walls of the svetting forming asupport for the boiler.

In testimony whereof I have hereunto set my hand in presence of two subscribing wit` nesses.

CARL OLSON.

Witnesses: A

CHARLES S. GooDING, ANNIE J. DAILEY. 

